Sienna and Keira hit the red carpet for The Edge of Love
The actresses, who became firm friends on set, appeared thrilled at being reunited for the event, remaining at each other’s side as they faced the cameras.
Perfectly co-ordinated, both stuck to monochrome with Keira in a neat black jacket and all white trouser suit.
Miller chose a rather more bizarre combo, in a black jumpsuit, with long fringed skirt. She topped off the look with a black bowler hat.
Earlier in the day, the girls dressed down for a photocall, again sticking to black and white. Miller chose a horizontal monochrome stripe dress and cardigan, while Knightley looked sweetly prim, in a high waisted black pencil skirt and floral blouse.
The film, which was written by Knightley’s mother Sharman MacDonald, is a biopic of Dylan Thomas.
The part of the Welsh poet is played by Matthew Rhys, who has recently been linked to his newly-single co-star Miller. She plays his wife Caitlin, while Knightley is Vera, Thomas’s childhood sweetheart.